Road-scarifier.



N. DB WIND.

ROAD SGAEIFIER.

APPLICATION FILED OCT. 30, 1911. 1,030,287. Patented June 25, 1912.

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ROAD SGARIFIER.

APPLICATION FILED 001 .30, 1911.

1 ,O3O,287, A Patented June 25, 1912.

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NORMAN DE WIND, OF CHICAGO, ILLINOIS, ASSIGNOR TO AUSTIN MANUFACTURINGCOMPANY, OF CHICAGO, ILLINOIS, .A. CORPORATION OF ILLINOIS.

ROAD-SCARIFIER.

Specification of Letters Patent.

Application filed October 30, 1911.

Patented June 25,1912. Serial No. 657,396.

To all whom it may concern:

Be it known that I, NORMAN DE WIND, a subject of Great Britain, residingat Chicago, in the county of Cook and State of Illinois, have inventedcertain new and useful Improvements in Road-Scarifiers, of which thefollowing is a specification.

This invent-ion relates to road scarifiers, the purpose of which is totear up or scarify the old surface of a road so that the same may beremoved or some of the material may be again utilized in reforming thesurface.

One of the objects of the present inven tion is the provision of amachine of this general character having powerful tools or tines adaptedto loosen and tear up the surface of the old roadway so that theirregularities of its surface are reduced to a uniform bed on which thenew crust or surface may be formed.

Another object of the invention is the provision of novel means foradjusting the tines to various depths of cuts and to various angles orinclinations relative to the surface being acted upon so that thesurface may be loosened to any desired depth and the action of the tinesmay be modified to suit the character of the particular surface which isbeing scarified.

Other objects and advantages of the invention will be apparent as it isbetter understood by reference to the following description whendescribed in connection with the accompanying drawings illustrating onepreferred embodiment thereof.

Referring to the drawings :Figure 1 is a plan View of a scarifierembodying my invention. Fig. 2 is a sectional elevation takensubstantially on the line 22 of Fig. 1. Fig. 3 is a transverse sectionalelevation taken on the line 33 of Fig. 2. Fig. 4 is a sectional viewtaken on the line 4c-41- of Fig. 2.

From the drawings it will be observed that the scarifier comprises amain frame consisting of the side members 5 connected at their forwardends by the upper and lower connecting front members 6 and 7respectively and connected together intermediately their ends by shaftsor rods 8, 9, 10, and 11, each of which carries a sleeve 12 which holdsthe side members apart, while the bolts or rods draw them snugly againstthe ends of the sleeves. The rear end of the machine is supported uponan axle 13 carrymg the rear supporting wheels 14 and 15, while the frontis carried upon a truck or turn table 16 support-ed upon the frontWheels 17. A tongue or draft rod 18 projects forwardly from the truck 16by means of which thescarifier may be drawn along and a cable or link 19connected to the front of the frame is utilized for drawing the machinewhen in actual operation, the

tongue 18 being at such time preferably removed by withdrawing the pin20 which holds the tongue in-place. A steering handle 21 is connected tothe upper end of a steering bolt 22 rigid with the truck 16 and projectsrearwardly over the machine. This handle is utilized to steer themachine when it is working, the steering movement being permitted byreason of the fact that the cable or link 19 connecting the machine withthe tractor is pivotally connected with the machine, thus enabling themachine to be steered by the operator so that no patches of surface areleft unworked, regardless of whether the tractor is accurately drivenand a clevis 23 is preferably formed on the sleeve carried by the rod 11to permit of the attachment thereto of other machines or im plements, ifso desired.

A shaft 24 is carried by the side members 5 and upon this shaft arepivotally mountedaplurality of tool holders 25. Each of these holders isadapted to receive a plurality of tools which are shown as teeth ortines 26, said tines being preferably made of steel of square sectionset so that a cutting edge is always presented to the work. Each toolholder is provided rearwardly of the pivotal shaft 24 with an extensionor shoulder 27 which is connected by means of a link 28 with anoperating lever pivotally mounted on shaft 29. Each lever consists of ashort arm 30 to which the link 28 is connected and a long arm 31 whichpreferably carries a weight 32 to assist in balancing the lever and tohold the tools in horizontal or inoperative position when the lever isswung forwardly to the full line position shown in Fig. 2. Hand grips 33are provided on the weights to be grasped by the hands of the operatorfor moving the levers. The tools are held in adjusted po sition in theholders by wedges 34 and said tools are preferably pointed at-each endso that they may be reversed or turned end for end, if desired. When thecounter weighted levers are in forward position, as shown in Fig. 2, thetines are thereby raised to horizontal or inoperative position and whenthe levers are in rearward position, as shown in dotted lines, theforward ends of the tines are lowered into operative position as shown.I

In order that the angle of the tines or tools may be adjusted or varied,depending upon the character of the surfaces being worked, I haveprovided novel adjusting mechanism which adjustably limits the downwardmovement of the cutting ends of the tools. To this end I have provided atransversely extending rod or shaft located above and slightly to therear of shaft 24:. Upon the shaft 35I have slidably mounted a pair ofannular buffers 36, each having a plurality of shoulders varying indiameter from one end of the buffers to the other. These buffers areheld in adjustable posit-ion longitudinally of the shaft by set screws37. hen it is desired to adjust the tools to a minimum depth and maximumangle with respect to the surfaces being worked, the buffers areadjusted longitudinally of the shaft until the largest shoulders are inthe path of the extensions 27 which project rearwardly from the toolholders as previously described. The tool holders when moved by thecounterweighted levers to lower the forward ends of the tines, willassume the positions shown in dotted lines in Fig. 2 with the extensions27 abutting against the largest shoulders of the buffers. Should achange in the angle of out be desired the buffers are moved along theshaft 35 to bring the larger shoul ders beyond the path of theextensions 27 and smaller shoulders of the desired size into position tobe engaged by the ext'en sions. It will be obvious that a greater tilt,of the tool holders will now be permitted and the forward ends of thetines will cut deeper into the surface being worked. Surfaces of variouscharacters require different adjustments of the tools and the range ofadjustment may be increased as much as desired by providing buffershaving the required number of annular shoulders of the proper size.

It is believed that my invention and many of its attendant advantageswill be understood from the foregoing without further description and itwill be obvious that various mechanical changes in the size, shape,proportion and arrangement of the various parts may be resorted towithout departing from the spirit of the invention or sacrificing any ofthe material advantages thereof.

What I claim is:

1. In a road scarifier, the combination of a frame, a plurality of toolholders pivotally mounted in said frame, tools carried by said holders,means for tilting the holders on their pivots to raise and lower theends of the tools, and bufiers positioned in the path of said holders tolimit the lowering movement of the tools, each of said bufferscomprising a plurality of cylindrical sections of different diameters,said buffers being adjustably mounted tovpermit a desired cylindricalsection to be interposed in the path of a holder.

2. In a road scarifier, the combination of a frame, a plurality of toolholders pivotally mounted in said frame, tools carried by said holders,means for tilting the hold-.

ers on their pivots to raise and lower the ends of the tools, a shaftmounted in the said frame adjacent the said holders, and a plurality ofbuffers, each formed of a number of cylindrical sections of different diameters mounted on the said shaft and adjustable longitudinally thereofwhereby the cylindrical section of desired diameter may be positioned inthe path of a holder to limit its tilting movement.

NORMAN DE IVIND.

itnesses:

IRA J. lVILsoN, M. A. Kinbni.

Copies of this patent may be obtained for five cents each, byaddressing. the Commissioner of Patents,

Washington, D. G.

